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低碳贝氏体钢中的时效析出行为
引用本文:李闯,王学敏,周桂峰,杨善武,尚成嘉,贺信莱.低碳贝氏体钢中的时效析出行为[J].北京科技大学学报,2006,28(6):534-538.
作者姓名:李闯  王学敏  周桂峰  杨善武  尚成嘉  贺信莱
作者单位:1. 北京科技大学材料科学与工程学院,北京,100083
2. 武钢(集团)公司技术中心,武汉,430080
基金项目:国家自然科学基金 , 国家重点基础研究发展计划(973计划)
摘    要:测定了Cu-Nb-Cr-Mo系低碳贝氏体钢的时效硬度变化行为,在Gleeble-1500热模拟试验机上模拟了各钢种的蠕变行为,利用金相显微镜、TEM研究了不同钢种的微观组织与沉淀析出.结果表明,含铜钢在不同温度时效时会发生明显的时效硬化效应,在不同温度的蠕变曲线上会出现平台,平台现象是由于蠕变过程中出现了第二相析出,平台出现意味着开始了第二相析出,平台结束则析出过程结束.

关 键 词:低碳贝氏体钢  蠕变  微观组织  时效析出  低碳贝氏体钢  析出行为  steels  carbon  precipitation  析出过程  第二相析出  蠕变过程  平台现象  蠕变曲线  硬化效应  发生  温度  含铜钢  结果  沉淀析出  微观组织  研究  金相显微镜  利用
收稿时间:2005-03-18
修稿时间:2005-06-28

Aging precipitation in low carbon bainitic steels
LI Chuang,WANG Xuemin,ZHOU Guifeng,YANG Shanwu,SHANG Chengjian,HE Xinlai.Aging precipitation in low carbon bainitic steels[J].Journal of University of Science and Technology Beijing,2006,28(6):534-538.
Authors:LI Chuang  WANG Xuemin  ZHOU Guifeng  YANG Shanwu  SHANG Chengjian  HE Xinlai
Abstract:The aging hardening behavior of low carbon bainitic steels with Cu, Nb, Cr, and Mo was determined, and creep tests for various steels were conducted on a Gleeble-1500 thermal simulator. Optical microscope and TEM were employed to study the microstructure and precipitates of the steels respectively. The results indicate that there is an obvious aging hardening behavior during the aging of copper containing steels; a plateau occurs on the creep curve at different temperatures, which results from the precipitation. The occurrence of the plateau means the start of the precipitation process, and when the precipitation finishes the plateau disappears.
Keywords:low carbon bainitic steel  creep  microstructure  aging precipitate
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